OCPA Impact CEO Dave Bond (right) and attorney Robert McCampbell discuss their protest against a sales tax proposal that would pay for teacher salary raises. OCPA Impact filed its protest Thursday morning at the Oklahoma Supreme Court, alleging that the ballot measure would be unconstitutional.

OCPA Impact CEO Dave Bond (right) and attorney Robert McCampbell discuss their protest against a sales tax proposal that would pay for teacher salary raises. OCPA Impact filed its protest Thursday morning at the Oklahoma Supreme Court, alleging that the ballot measure would be unconstitutional.